Grip wheel



March 1, 1932. M. ROBINA 1,847,982

GRIP WHEEL Filed April 12, 1929 2 Sheets-Sheet l '4f ,3 n INVENToR wlTNEssl-:s 1. Zckael Robina M. ROBINA GRIP WHEEL March 1, 1932.

Filed April l2 1929 2 Sheets-Sheet 2.

l Livr.

Ifill/ILV INVENTOR Mah/mel wm BY/ n A ATTORNEYS Patented Mar. 1, `1932 UNITED sTTEs PATENroFFicE A MICHAEL ROBINA, OF NEWARK, NEW JERSEY, YASSIGNORl TO THE IN TERSTATE EQUIP- MENT CORPORATION, OF NEW YORK, N. Y., A'CORPORATION OF NEW YORK y tion is to, provide a grip wheel a-nd tractionV can? WHEEL Application filed April V12, 1929.' Serial No. 354,641.y

This invention relates to grip wheels.` The invention rela-tes more particularly ltO grip Wheels or traction wheels for the-drivof cables as in Conveyor systemsor the e. e It is among the objects of the present in-v vention to provide an improved grip Wheel includingv novel and improved` traction elements associated therewith.

A further object ofthe invention is yto,

provide an improved traction element for grip wheels, including a pair o'f co-operating pivoted members which by atogglen or cam# ming action increase the traction provided therebyin proportion'to thetension ofthe cable associated therewith;

, A further object of the present invention is to provide improved traction members including novel and improved adjusting mea-ns whereby the co-operation. of such members i,

may be readily adjusted without requiring the complete disassembly of the device.

A further important object of 'theinvenelement therefor so constructed that a large number of traction elements may be associated with the wheel and'adjustment thereof may be readily had. Y

Numerous other objects .and features o-f the invention include the combination and interrelation of parts whereby the whole forms a novel, impro-ved,y efficient and economic structure. f

From a considera-tion ofthe following specification, it will be seen that the invention provides for the close associationof the traction elements on the' wheel, whereby an embodiment of thewpre'sent invention illustrating its association with other apparatus;

Fig. 2 is a topplan View of the grip wheel illust-rated in Fig. 1^;

' Fig. 3 is a sectional view taken on the lines 3e-43 of Fig. 2;

Fig. 4 is a. sectional view taken on the lines 4-4 of Fig.,2; j

Fig. 5 is a sectionahviewftaken on'the lines 5'-`5 of Fig. 3;

Fig. 6 is a 'sectional view taken on the lines 6-6 of Fig. 3. i Y

ln connection with the present invention, it will be understood that the invention re- Vr'latesto certain improvements inthe construe tionof existing grip wheels. 4Thepresent invention seeks to improve the commonly used grip wheel 'in that 'the construction isfsuch that anincreased number of the traction elements may be mounted on a single wheelsurface, thus increasing the traction lof thevwheel.

The present invention also improves the com- Y mon construction of such-devicesbythe provision of novel and improved means for'ad justing the* distance betweenthe usual Vpivoted Vgripping elements. 1 A

' y Referring more yparticularly to Fig.l 1' of the drawings, the wheel includes theusual hub l0 and radiating spokes ll, which carry the peripheral flange 12j. Mounted upon the flange 12 are the traction members generally illustrated 'at 13 in Fig. 1. Over the wheel and between the engagingrlug's of the traction elements 13, as will be hereinafter described in detail, a cable 14 passes. It will be understood that' movement of the Vcable is designed to be controlled by rotation of the wheel. `In connection with Fig. 1, as illusf trate'd in dotted lines, the present invention is admirablysuited `for conveyor systems of the type disclosed and including 'a wheeled car or bucket 15, 'which is supported and guided bythe railsl and which is associated withv the cable 14 for movement Ain responsevjtorotation ofthe wheel. -It'will, of

course, Vbe understood thaty the present invention relates tothe wheel and its associated traction wheel fand that it may be used Vwith anydesired type of cable andlwith anyconveyor-systemor otherapparatus in which a I cable is utilized. f Referring more particularly to the figures of the drawings disclosing the detail construction of the traction members, itwill be seen that the members include a base or housing member having a bottom 17 and parallel upwardly extending side walls 1S. The housing member is elongated, the bottom 17 being slightly curved in transverse section to conform with the radius of the flange 12. It will be seen that the housings are designed to be positioned in close parallel relation upon the flange 12 to which they may be secured by bolts 19 extending therethrough. It will be understood, of course, that the housings may be secured to the flange in any other desired manner and that the invention is not confined to the specific securing members.

For (zo-operative eng-agement with the cable 11i., there is provided a .pair of comple` mentary pivotally moving lugs 20 which are mounted between .the side walls 18 of the housing and including oppositely offset fingers 21 having co-operating cable-engaging faces 22. As seen in the drawings, the lingers 21 of the lugs 22 interlock in` spaced relation whereby the extremities of the lingers while the 4lugs are in upward position, engage the under side of the associated lugs to assist in limiting the :upward pivotal movement thereof. The opposite extremities ofthe lugs 20 are each provided witha pair of project ing stop membersy 23Y which when the lugs are in raised1 pivotal position, Contact with the bottom 17 Vto limit such movement, the raised position of the lugs referred to being oisclosed in Fig. 4l.

For normally retaining the lugs in raised pivotal position, spring elements 2li are pro vided, the Aower ends of which restugon the bottom 17, while the upper ends are received within recesses 25 in the lugs 20, the Varrangement being such that downward pivotal movement of the lugs is against the tension of the springs.24.-. Y

To permit the inward movement of the cablell between the lugs and clamped thereby, the side yflanges 18 are cut out as at 26 in .line with the co-operating inner portions of the lugs. VFor adjustably pivoting the lugs for longitud-final adjustment between the sides 18, the Vlugs Y.are mounted upon sleeves y27 vwhich are cylindriml in external cross section and which are eccentrically bored vto provide an internal hexagonal bore 28 which receives therethrough a vbolt 29 including hei:- agonal flanges 30 adjacent its ends and a central hexagonal portion 31, the intermediate .portion-of the bolt,32, being cylindrical. The boltf29 extends-through andlprojects from the sleeve 27,-the iianges 30 being' received in co` operating hexagonal apertures 33 in the side wallsl, the bolt 29 being Vsecured by a suitable nut and washer 311-.V

En lthe operation of the device, Athe cable 14 encircles the wheel, being received upon ,the surfaces 2210i the lugs- 20, which when the cable is slack, are in the upwardly pivoted position shown in Figs. 3 and 4. l/Vhen the device is applied to the cable which would normally tend to cause a slipping of the cable over the Wheel, the lugs 2O move downwardly under the pressure of the cable, the downward rocking of the lugs compressing the 4cable 14 therebetween in a manner to firmly grip the same and provide adequate traction of the wheel with respect to the cable. The downward movement of the lugs isin :opposition to the tension of the springs 2li, which are lcompressed by such movement. The upward movement of the lugs is restricted within predetermined limitsby the size and configuration of the stops 23 and by the inter-locked relation ofthe projecting lingers 21 of t-he lugs. It wil-l be understood that the pivotal movement of the lugs is with respect to the sleeves 27, the lugs rotating thereover. For lubricating the sleeves 27to permit free movement of 4the lugs thereover, suitable oil ducts 35 ar-e provided through which oil may be applied 'to the surface ofthe sleeves from the upper side of the lugs ,20.

For adj Listing the relationship of the lugs longitudinally of the housing, the nut 34 is, removedand the bolt 29 slipped with respect to the sleeves 27, whereby the hexagonal flanges 30 will be moved from their Vapertures 33 and by a suitable wrench the Ebolt may be turned, turning with it the sleevesy through the engagementofone .of .the flanges 30 and the centralliexagonal portion 31. The rotation of the sleeve, due to .the eccentricity of the central bore, will eli'ect a difference in the longitudinally spacing of the axes of the lugs 20. The adjusting operation Afis .accomplished while Vthe belt is in the l.partially withdrawn position shown inFig. lt will be seen that the necessity of entirely removing the bolt Aor the necessity .of using :removable shims, bushings, or the like, 'is avoided. This .feature ofthe presentinvention is especia'lly valuable in .that it ,provides for the close spacing :of .the traction elements upon the wheel, the vnecessity for providing space for the entire removal of the pivot bolt being avoided.

From the foregoii'lg itwill be read'ilyseen that the present invention provides a novel and efficient traction wheel andtraction -elemen-ts therefor, which may be' read-ily ad justed tocompensate for wea-r and which will be effective -in increasing the traction -of the wheel with respect vto lthe cable inresponse to increased weidhtlapplied to the cable.

it will be rea ily understoodthat'the present preferred embodimento'f the inventfion'is only one'of manifold variations instructural details an'd'that numerousfchanges, modifica'- tions and {theafull use ofiequivalents maybe resorted to withoutdeparting from the spirit .or scope of the invention as :outlined ,in vthe appended claims.

said lugs including co-operating cable-engag-l ing faces, said lugs being movable in response to pressure applied thereto by a cable, and pivot sleeves for adjusting said lugs with respect to each other.

3. A cable traction element, including a base, lugs pivotally mounted on said base, said lugs including co-operating cable-engag ing faces, said lugs being movable in response to pressure applied thereby by a ca-` ble, pivot sleeves for adjusting said lugs with respect to' each other, and resilient elements for retaining said lugs in normal spaced relation. Y l t 4. A cabletractionn element, includinga transversely arcuate base, lug members pivotally connected with said'base, and means for adjusting the spaced relation ofthe pivot points oit said lug members.

5. A cable traction element, .including a j transversely arcuate base hav-ing vertically extending side walls, lug members pivotally connected with said base between'said walls, and means for adjusting the spaced relation of the pivot points of said lug members.

6. A cable 4traction element, including a transversely arcuate base havingV vertically extending side walls, lug members pivotally connected with said base between'` said walls, and means for adjusting'` the spaced relation of the pivot points of said lug members, said means including a rotatable sleeve eccentrically mounted on said base.

7. A cable traction element, including' a transversely arcuate base having vertically i extending side walls, lug members pivotally connected with said base between said walls, and means for adjusting the spaced relationof the pivot points of said lug members, said means including a rotatable sleeve eccentrically mountedon said base between said side walls.

8. A cable traction element, including a transversely arcuate base having vertically extending side walls, lug members pivotally connected with said base between said walls, means for adjusting the spaced relation of the pivot points of said lug members, said means including a rotatable sleeve eccentriextending side walls, lug members pivotally connected with said base between Said walls,

means for adjusting the spaced relation of the y pivot points of said lug members, said means including a rotatable sleeve leccent'rically mounted on said base between 'said side walls,

means for constantly urging said lug members into afcable receiving relation, and means vor limiting said movement of said lug `memers.

10. Al cable tractionV element, including la transversely arcuate base having vertically extending side walls, lug members pivotally connected with said base between said walls, means for adjustingthe spaced relation of means including a rotatable sleeve eccentri-y cally mounted on saidbase between said side .the pivot points of saidlug members, said l walls, means for constantly urging said lug members into a cable receiving relation, means for limiting said movement of said lug members, and recesses in said side walls co-operatto receive and guide a cable.

ments carried by said wheel and extending transversely across said flange, said elements including a basetransverely arcuate to conform withthe arcuate coniigurationof said flange, and a pair of pivotally mounted jaws receivable within said base, said base having side members for retaining said jaws therebetween, said side members being intermediately recessed to .permit a cable toextend below their'outerfedges, said side members` being apertured to receive eccentric bushings, pivot members for said gripping elements respectively received in said bushings, the aperture in one of said side members being non-circular, each pivot member having a non-circular portion to prevent rotation of the pivot member when said non-circular portion is fully received in the non-circular aperture in. the related side member.

MICHAEL BOBINA.

cally mounted on said base between said v side walls, and means for constantly urging said lug members into a cable receiving relation.

9. A cable traction element, including a transversely arcuate base having vertically Ving with the extremities of said lug members l lli) 

